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Does anything actually solve the oil pressure drop in corners?
There are a few different baffle designs and a few different sump cover designs, but a lot of what I read suggests the problem persists. Does any of these actually make a material difference to the oil pressure in corners, except for the 2qt extension since that cuts too much ground clearance?
An accusump is probably the only real answer on this, but it isn't a fix. It's more like a capacitor in an electrical circuit. When oil pressure drops, it feeds in oil from it's own pressurized reservoir. If I were racing an M96 or M97 engine or even doing time trials on slicks, I'd probably install an accusump as added insurance.
In 2011 when I bought a '99 to use primarily as a DE car, I was asking all these questions too. Not happy with the answers I got on this forum, I went to the Racing and DE forum. 996 drivers there had been fighting oil starvation for a long time. A lot of knowledge had been gained since the intro of the car. It was the prevailing theory at that time that on the track, oil starvation would occur on long left hand sweepers when running true racing slicks. They did not think that street / track tires like RA1 or NT01's could generate enough g's to cause this to happen. I ran my car for 4+ years with an X51 oil pan and Bridgestone RE-11 tires. Over that time I got maybe a flicker or 2 from the oil pressure light or saw the needle drop to 10.
Since then, I have seen two things of interest on this topic. First, the original X51 package over came oil starvation by adding a second scavenging pump to the passenger side cylinder bank. The driver's side aready had a pump and is why you should not get an starvation on right hand sweepers. I am adding a diagram of the X51 oil circuit and a picture of the actual pump below.
If you have the full X51 package, which the 40th Anniversary cars do not have, you would see the pump and return oil lines easily when looking under the car.
The second point of interest is that I read that if you are running tires with more grip than "N" spec, then you may be able to generate the g's to pool the oil in the right bank. I think that was from Adrian Streather's 996 Essential Companion.
So the bottom line as I see it is that for "spirited runs around town" an oversized sump should keep you very safe. If you are going to the track, then an ACCUSUMP is the ticket.
First, the original X51 package over came oil starvation by adding a second scavenging pump to the passenger side cylinder bank. The driver's side aready had a pump and is why you should not get an starvation on right hand sweepers.
Do you know if those highlighted X51 parts were offered as a retrofit? Are they plug-and-play into M96 or are the X51 casings somehow different?
Is the extra pump the same unit (maybe rotated 180 degrees) as the driver's side?
I wonder why LN and other aftermarket vendors do not offer this type of solution.
Definitely not bolt on. My understanding is they almost unobtainable even for X51 package cars. And when available from Porsche, they we pricey. The last price I saw was around $3100.00, I think.
Just saw your edit. I think there is an issue getting both sides. They are mirror images of each other and not just a 180 degree turn to fit the opposite side. Can you find a complete X51 package anywhere?
So in the present day is the consensus that if I'm tired of the oil pressure going below 2 bar in turns I should put in the EBS Racing baffle at my next oil change, or save my money?
So in the present day is the consensus that if I'm tired of the oil pressure going below 2 bar in turns I should put in the EBS Racing baffle at my next oil change, or save my money?
Remind us what the situation is when you drop to 2 bar?
09-15-2020, 05:43 PM
Does anything actually solve the oil pressure drop in corners?
